Taxon Details

Hypogymnia schizidiata

island tube lichen

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Taxon Summary:

Hypogymnia schizidiata, commonly known as island tube lichen, is a foliose lichen in the Parmeliaceae that is found in California and elsewhere. It occurs within Chaparral, and Closed-cone coniferous forest, growing at elevations from 360 to 405 meters. Hypogymnia schizidiata is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Hypogymnia schizidiata McCune
Common Name: island tube lichen
Family:	Parmeliaceae
Element Code:	NLT0032640
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G2G3
State Rank:	S2
Other Status:
CRPR Changes:
Add Date:	2014-03-01
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: foliose lichen

Blooming Period:

Elevation:
360 - 405 meters
1180 - 1330 feet

General Habitats:

Closed-cone coniferous forest
Chaparral

Microhabitat Details: On bark and wood of hardwoods and conifers

Microhabitat:

Notes

Notes: Often occurs on Juniperus, Pinus, Quercus, and Simmondsia. See Bulletin of the California Lichen Society 13(2):42-44 (2006) for CALS Conservation Committee sponsorship.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	3	30 %
Improper burning regime	3	30%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					10
A	B	C	D	X	U
2	0	1	0	2	5

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	7

Presence:
Presumed Extant	8
Possibly Extirpated	2
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

California Counties and Islands: Name (Code)
Marin (MRN), Mendocino (MEN), San Mateo (SMT), Santa Barbara (SBA)

Quads: Name (Quad Code)
Drakes Bay (3812218), Inverness (3812217), Montara Mountain (3712254), Point Arena (3812386), San Francisco North (3712274), Santa Cruz Island B (3311986), Santa Rosa Island North (3312081), Santa Rosa Island South (3312071)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory